Milind mike1011

ActiveAdmin custom action

Polymorphic Associations reversed

It's pretty easy to do polymorphic associations in Rails: A Picture can belong to either a BlogPost or an Article. But what if you need the relationship the other way around? A Picture, a Text and a Video can belong to an Article, and that article can find all media by calling @article.media

This example shows how to create an ArticleElement join model that handles the polymorphic relationship. To add fields that are common to all polymorphic models, add fields to the join model.

Install wkhtmltopdf on Ubuntu

This was tested on:

Ubuntu 14.04 x64
Ubuntu 16.04 x64

Installation

Encoding Video

Installing

Install FFmpeg with homebrew. You'll need to install it with a couple flags for webm and the AAC audio codec.

brew install ffmpeg --with-libvpx --with-libvorbis --with-fdk-aac --with-opus

Do you have spaces in your Windows username?

Create a new account on Windows without a space.

#Installation

Download cygwin from http://cygwin.com
Run setup-(x86|x86_64).exe
Click next until selecting repo to download packages
Choose http://cs.vt.edu (gotta go fast), click next

	sudo -i
	cd
	apt-get install build-essential checkinstall && apt-get build-dep imagemagick -y
	wget http://www.imagemagick.org/download/ImageMagick-6.8.7-7.tar.gz
	tar xzvf ImageMagick-6.8.9-1.tar.gz
	cd ImageMagick-6.8.9-1/
	./configure --prefix=/opt/imagemagick-6.8 && make
	checkinstall

	require 'aws-sdk'

	s3 = Aws::S3::Resource.new(
	region: 'us-east-1',
	credentials: Aws::InstanceProfileCredentials.new()
	)
	bucket = s3.bucket('my-daily-backups')

	file = (DateTime.now).strftime("%Y.%m.%d-backup")
	if bucket.object(file).exists?

	#Make sure heroku toolbelt and rvm are installed
	#heroku toolbelt available to download on their site, rvm available via curl
	\curl -sSL https://get.rvm.io \| bash -s stable --ruby

	rvm use "2.1.1"
	rvm use --create 2.1.1@project
	gem install rails

	#if using postgres (good for heroku) pass argument to 'rails new'
	rails new project --database=postgresql

	stats = Sidekiq::Stats.new

	stats.queues

	stats.enqueued

	stats.processed

	stats.failed

	# this monit config goes in /etc/monit/conf.d

	check process puma_master
	with pidfile /data/myapp/current/tmp/puma.pid
	start program = "/etc/monit/scripts/puma start"
	stop program = "/etc/monit/scripts/puma stop"
	group myapp

	check process puma_worker_0
	with pidfile /data/myapp/current/tmp/puma_worker_0.pid